# Consumptive hypothyroidism complicating infantile hepatic hemangioma successfully treated with propranolol: a case report and literature review

## TL;DR

A rare case of consumptive hypothyroidism in an infant with liver hemangioma was successfully treated with propranolol, avoiding hormone therapy.

## Contribution

This case report highlights propranolol as an effective treatment for consumptive hypothyroidism in infantile hepatic hemangioma.

## Key findings

- Propranolol treatment led to rapid tumor reduction and restored thyroid function in a 2-month-old infant.
- 59.37% of CH cases secondary to IHH were treated with propranolol, often reducing the need for high-dose thyroid hormone.
- Early detection and treatment of IHH and CH can avoid the need for hormone replacement therapy in some patients.

## Abstract

Consumptive hypothyroidism (CH) is a rare paraneoplastic syndrome, caused by the overexpression in vascular tumors of type 3 deiodinase (D3), converting thyroid hormones into inactive metabolites.

We report the case of a 2-months-old male infant with diffuse infantile hepatic hemangioma (IHH). Thyroid function screening detected a CH. The patient was promptly treated with propranolol: after 2 weeks, a marked reduction in tumour size was observed and thyroid function was restored. No hormone replacement therapy was required. We then performed a literature review on PubMed/Medline: based on the title and abstract, we extracted 64 cases of CH secondary to IHH published between 2000 and 2023. 59.37% patients received propranolol, either alone (52.63%) or in combination with other treatments. 18.75% patients required surgical treatment or liver transplant. LT4 was administered in 92.85% of the patients. Patients who received propranolol required a lower dosage of LT4 than patients who received other treatments.

Thyroid function should be evaluated in all children with IHH to rule out CH. Early recognition of IHH and CH and prompt therapy with propranolol can effectively treat IHH and the subsequent hypothyroidism, sometimes even without the need of hormone replacement therapy.